Standardize usage of virtual/override/final in content/browser/

content/browser/media/capture/web_contents_audio_input_stream.h

Index: content/browser/media/capture/web_contents_audio_input_stream.h
diff --git a/content/browser/media/capture/web_contents_audio_input_stream.h b/content/browser/media/capture/web_contents_audio_input_stream.h
index a0468ff834ab27e1c7a7f768db11dfee6956c37d..d66d27004b524db05627b0b5efd2fef3bf148fac 100644
--- a/content/browser/media/capture/web_contents_audio_input_stream.h
+++ b/content/browser/media/capture/web_contents_audio_input_stream.h
@@ -37,16 +37,16 @@ class CONTENT_EXPORT WebContentsAudioInputStream
     : NON_EXPORTED_BASE(public media::AudioInputStream) {
  public:
   // media::AudioInputStream implementation
-  virtual bool Open() override;
-  virtual void Start(AudioInputCallback* callback) override;
-  virtual void Stop() override;
-  virtual void Close() override;
-  virtual double GetMaxVolume() override;
-  virtual void SetVolume(double volume) override;
-  virtual double GetVolume() override;
-  virtual void SetAutomaticGainControl(bool enabled) override;
-  virtual bool GetAutomaticGainControl() override;
-  virtual bool IsMuted() override;
+  bool Open() override;
+  void Start(AudioInputCallback* callback) override;
+  void Stop() override;
+  void Close() override;
+  double GetMaxVolume() override;
+  void SetVolume(double volume) override;
+  double GetVolume() override;
+  void SetAutomaticGainControl(bool enabled) override;
+  bool GetAutomaticGainControl() override;
+  bool IsMuted() override;
 
   // Create a new audio mirroring session, or return NULL on error.  |device_id|
   // should be in the format accepted by
@@ -78,7 +78,7 @@ class CONTENT_EXPORT WebContentsAudioInputStream
       const scoped_refptr<WebContentsTracker>& tracker,
       media::VirtualAudioInputStream* mixer_stream);
 
-  virtual ~WebContentsAudioInputStream();
+  ~WebContentsAudioInputStream() override;
 
   scoped_refptr<Impl> impl_;